Hemstitch embroidering-machine.



No. 627,748. Patented June 27, I899. J. GUTMANN.

HEMSTITGH EMBROIDERING MACHINE.

(Application filed Nov. 19, 1888.)

(No Model.)

m: norms PETERS cu. PHDTO-LITHO.. WASHINGTON. n. c.

UNITED STATES PATENT QFFICE'.

JULIUS GUTMANN, OF BERLIN, GERMANY, ASSIGNOR TO FABRIK FURSPEZIALNAHMASCHINEN ACTIEN-GESELLSCHAFT, (PATENTE JULIUS GUTMANN,) OFZURICH, SWITZERLAND.

HEMSTITCH EM BROIDERING-MACHINE SPECIFICATION forming part of LettersPatent No. 627,748, dated June 2'7, 1899 Application filed. November19,1898. Serial No. 696,898. 7N0 model.)

To all whom it mcty concern.-

Be it known that I, JULIUS GUTMANN, asubject of the King of Prussia,German Emperor,

. residing at the city of Berlin, Germany, have invented certain new anduseful Improvements in Curved or Winding Seam Sewing- Machines; and I dohereby declare that the following is a full, clear, and exactdescription of my said invention, such as will enable others skilled inthe art to which it appertains to make and use the same, reference beingbad to the accompanying drawings, and to letters of reference markedthereon, which form a part of this application.

This invention has relation to sewing-machines organized to produce thepoint dechelle or J acobs-ladder stitch of the type shown and describedin Letters Patent of the United States granted to me February 28, 1899,No. 620,304, and organized to produce-curved or winding seams. In thesemachines, as well as in others organized to produce irregular andparticularly curved or Winding seams, it is necessary to impart to theneedle-bar, to the work-holder, and to the looper or shuttle synchronousrotary movements in conformity with the curvatures of the seam to beproduced, and this has heretofore been done by hand. As is well known,the transmission of these rotary movements to the parts referred tocannot be efiected by hand with the precision required for the exactduplication or successive reproduction of a given pattern.

This invention has for its object the provision of means whereby thisnecessary rotation is mechanically imparted to the needle- -bar andneedle-plate and to the looper or shuttle through the medium of apatternwheel and mechanism operated thereby.

In the accompanying drawings I have illustrated in Figure lasewing-machine organized as shown and described in mypatent abovereferred to and embodying my improvements, and in Fig. 2 I have shown afragmentary elevation illustrating a modification in the mechanismwhereby the needle-bar and the looper or shuttle housing'to which theneedle-plate is attached are simultaneously turned.

Inasmuch as the general construction of the machine is fully describedin my said patent a description of the mechanism for mechanicallyimparting synchronous rotary movements to the needle-bar and to thelooper or shuttle housing or casing with which the work-plate isconnected will suffice.

On the main driving-shaft V of the machine is secured a cam-groovedsleeve T, into the groove of which projects a stud (which pref erablycarries a roller) secured to a link P, pivoted at P to the machine-armand provided with a longitudinal segmental slot connected with one endof a connecting-rod 19, whose other end is connected with the longer arm10 of a two-armed lever P fulcrumed upon astud or pin, on which isloosely mounted a pattern cam or wheel M, that has secured thereto orformed integrally therewith a ratchet-wheel U, engaged by aspring-controlled pawl 25, pivoted to the shorter arm 19 of said lever PThe cam-groove in sleeve T on driving-shaft V is of such a configurationas that during the rotation of said shaft the link P is oscillated,whereby the lever P is rocked on its pivot and a progressive rotarymovement imparted to the pattern cam or wheel M by the pawl t. Atwo-armed lever H is pivoted to a stud a on the machine-arm, the uppervarm of which lever carries a roller r, held in contact with thepattern-wheel by any well-known means, (not shown)as, for instance,byaspring connected with the arm h and with the machine-arm or by aspring coiled upon the lever-pivot a, the free end of which spring actsupon the arm h of said lever H to maintain the roller r on its arm h incontact with said pattern-wheel. The arm h of lever H has at its lowerend a toothed rack Z in gear with a pinion S, revoluble on a spindledepending from the bedplate of the machine, and said spindle alsocarries a belt or cord pulley or a sprocketwheel K, belted or cordedto alike pulley or connected with a like sprocket-wheel K on the shaft H, towhich is secured the crankhandle, whereby the needle-bar and the looperor shuttle housing are turned auto matically or can be turned by hand.It will thus be seen that at each oscillation of the ,hereinbeforereferred to.

lever H rotary movements are imparted to the crank-shaft H andtherethrough to the looper or shuttle housing or casing and to theneedlebar by means of mechanism substantially such as shown anddescribed in my patent These rotary movements of the pulley or sprocketK are transmitted to thelooperor shuttle housing through thebevel-gearing R, spindle W, and bevelgearing R R and to the needle-barthrough the bevel-gearing R R R and spindles O and C In the modificationshown in Fig. 2 the lower end of the arm h of lever H is pivotallyconnected with a rack-barz in gear with a pinion "r on the crank-shaftH, said rack bar being guided in a suitable bracket on the under side ofthe bed-plate of the machine.

Having thus described my invention, What I claim as new therein, anddesire to secure by Letters Patent, is-

1. In a sewing-machine such as described, the combination with thestitch-forming appliances, consisting essentially of a reciprocatingneedle-bar free to revolve in its bearings, an oscillating looper orshuttle and its housing the latter carrying the needle-plate, thedescribed mechanism for synchronously revolving said needle-bar andlooper-housing, and the driving-shaft II of said mechanism carrying ahand-crank; of the pattern-Wheel- M on the vertical machine-arm, themain driving-shaft V, mechanism operated by said shaft and imparting tothe pattern-wheel a progressive rotation, the rock-lever II trail ing onthe pattern-face of said wheel, and mechanism operated by saidrock-lever to re volve the aforesaid shaft H, substantially as and forthe purpose set forth.

2. In a sewing-machine such as described, the combination with thestitch-forming appliances, the mechanism for synchronously revolving theneedle-bar and looper or shuttle housing, the driving-shaft H for saidmechanism and the main shaft V, of the patternwheel M on the verticalmachine-arm, the ratchet-wheel U revoluble with said wheel, therock-lever P and its pawl in engagement with said ratchet, the slottedlink P connected with lever I and oscillated by the main shaft, therock-lever I-I trailing on the pattern-face of the pattern-wheel, andgearing operated by said lever and geared to the aforesaid shaft H,substantially as and for the purpose set forth.

In testimony that I claim the foregoing as my invention I have signed myname in presence of two subscribing witnesses.

- JULIUS GUTMANN.

Witnesses:

HENRY HASPER, O. H. DAY.

